Fifth-wheel



(No Model.)

H. B. YARYAN.

FIFTH WHEEL. No. 306,371. Patented 0013.7, 1884.

'M' Z V lNVENT/OR i ATTORNEYS" HARVEY I3. YARYAN, OF ORAIVFORDSVILLE,INDIANA, ASSIGNOR OF TWO- THIRDS TO D. W'. GERARD, OF SAME PLACE, AND W.T. ROYSE, OF IN- DIANAPOLIS, INDIANA.

FIFTH-WHEEL.

SPECIFICATION forming part of Letters Patent No. 306,371, dated October7, 1884.

Application filed October 16, 1883. (No model.)

To aZZ whom it may concern Be it known that I, HARVEY B. YARYAN,acitizen of the United States, residing at Crawfordsville, in the countyof Montgomery and State of Indiana, have invented certain new and usefulImprovements in Fifth -VVhee1s; and I do declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, and to lettersor figures of reference marked thereon, which form a part of thisspecification.

Figure 1 of the drawings is a representation of this invention, and is atop view. Fig. 2 is a bottom view of upper portion. Fig. 3 is a top viewof the under portion. Fig. 4 isa vertical section taken in line with thebroken line shown 011 Fig. 1.

This invention has relation to fifth-wheels for four-wheeled vehicles;and it consists in the construction and novel arrangement of devices, aswill be hereinafter fully described, and particularly pointed out in theclaim appended.

Referring by letter to the accompanying drawings, ct designates thebase-plate of the fifth-wheel, which is to be secured in any suitablemanner to the forward axle of the vehicle, or to the evener, doubletree,or singletree, or other place to which it is applicable. This base-platea has a central boss, 1), around which is a seat, a, for the receptionof a leather washer, (I. A ring, 6, is secured to or formed with thebase-plate a, the boss I) being its axis. At diametrically-oppositepoints of the ring 0, and on its inner periphery, are two segmentalunder-beveled arcs, f f, the bevels extending from their inner curvededges from above downward and outward. The bolster-plate g has a centralhole, h, which passes into the thimble h in line with the hole 2 in theboss and baseplate, forthe passage of the king-bolt. The thimble h istapering from below upward in the center piece, k, to receive the bosswhen the two parts of the fifth-wheel are in engagement. The centerpiece, I, on the under side I of the bolster-plate has vertical sides Iand arc-shaped ends, which project beyond the sides, and are beveledfrom below inward and upward, to correspond to the under bevels of thearcs in the ring. The outline of the center piece conforms to theoutline of the opening in the ring, and it is dropped to place up- 011the boss through the opening in the ring, and the bolster-plate is thenturned into alignment with the base-plate, when the fifth-wheel is inits normal position. From this position it can be turned in eitherdirection and will not lose its seat. This fifth-wheel does not occupymuch space and does not wear rapidly. The washer may be renewed whenworn wlth but little trouble, and it saves the wear of the metal.

The device is cheap and simple, and may be applied to all vehicles, aswell as to doubletrees and single-trees.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent. is-

The fifth-wheel herein described, consisting of the base-plate a, havingthe two segmental under-beveled arcs f f, and the central boss, b,rising to the same horizontal plane, and pro vided with the centralhole, 1', the bolster-plate 9, having the central hole, h, and thecenter piece, It, provided on its under side with vertical sides Z andare-shaped ends, which project beyond the sides, as shown, and arebeveled parallel from below inward and upward, to correspond to theunder bevels of the arcs in the ring and the outer wall of the boss 12,whereby the under side of the said bolsterplate is allowed to bear onthe top face of the boss 5, and an interspace formed between itsdepending beveled arcs and the base-plate a for the reception of thewasher d, substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

D. W. GERARD, Fisi-inn DOHER'IY.

